Enhanced settling and dispersion of inertial particles in surface waves
Enhanced settling and dispersion of inertial particles in surface waves
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增强表面波中惯性粒子的沉降和分散
DOI：
10.1017/jfm.2022.95
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发表时间：
2022
影响因子：
3.7
通讯作者：
Pujara, Nimish
中科院分区：
文献类型：
--
作者：
DiBenedetto, Michelle H.;Clark, Laura K.;Pujara, Nimish
环境中的微粒物质，如沉积物、海洋垃圾和浮游生物，是通过表面波浪运输的。这些惯性粒子的输运不同于斯托克斯漂移所描述的流体包。在这项研究中，我们考虑了负浮力粒子在任意深度由线性波理论描述的表面波诱导的流动中沉降的输运。我们考虑在低雷诺数极限下处于线性阻力状态和在过渡雷诺数范围内处于非线性阻力状态的粒子。通过对典型应用的分析，我们发现非线性是最广泛适用的。从粒子斯托克斯数展开中，我们得到了惯性粒子在波中的运动的运动学表达式，从无量纲振幅的多尺度展开中，我们得到了波平均漂移速度的表达式。这些漂移速度类似于斯托克斯漂移，可以用于不分解表面波的大尺度模型。水平漂移速度相对于流体包裹的斯托克斯漂移减小，垂直漂移速度相对于颗粒末端沉降速度增大。我们还证明了同时释放的沉降粒子云将在水平方向上分散。最后，我们通过与数值模拟和实验数据的比较，讨论了我们的表达式的准确性，数值模拟和实验数据显示了相同的趋势。
Particulate matter in the environment, such as sediment, marine debris and plankton, is transported by surface waves. The transport of these inertial particles is different from that of fluid parcels described by Stokes drift. In this study, we consider the transport of negatively buoyant particles that settle in flow induced by surface waves as described by linear wave theory in arbitrary depth. We consider particles that fall under both a linear drag regime in the low Reynolds number limit and in a nonlinear drag regime in the transitional Reynolds number range. Based on an analysis of typical applications, we find that the nonlinear regime is the most widely applicable. From an expansion in the particle Stokes number, we find kinematic expressions for inertial particle motion in waves, and from a multiscale expansion in the dimensionless wave amplitude, we find expressions for the wave-averaged drift velocities. These drift velocities are analogous to Stokes drift and can be used in large-scale models that do not resolve surface waves. We find that the horizontal drift velocity is reduced relative to the Stokes drift of fluid parcels and that the vertical drift velocity is enhanced relative to the particle terminal settling velocity. We also demonstrate that a cloud of settling particles released simultaneously will disperse in the horizontal direction. Finally, we discuss the accuracy of our expressions by comparing against numerical simulations, which show excellent agreement, and against experimental data, which show the same trends.
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影响因子：
1.5
作者：
S. Ikeda;Masashige Yamasaka
通讯作者：
S. Ikeda;Masashige Yamasaka
振荡流中粒子的下落速度
DOI：
--
发表时间：
1985
期刊：
影响因子：
--
作者：
P. Hwang
通讯作者：
P. Hwang
影响因子：
2.7
作者：
Clark, Laura K.;DiBenedetto, Michelle H.;Koseff, Jeffrey R.
通讯作者：
Koseff, Jeffrey R.
影响因子：
3.7
作者：
DiBenedetto, Michelle H.;Ouellette, Nicholas T.
通讯作者：
Ouellette, Nicholas T.
影响因子：
2.7
作者：
DiBenedetto, Michelle H.;Koseff, Jeffrey R.;Ouellette, Nicholas T.
通讯作者：
Ouellette, Nicholas T.